Evaluation of Aortocoronary Bypass Stents with Cardiac MDCT Compared with Conventional Catheter Angiography
| Autor: | Andreas H. Mahnken, Rüdiger Blindt, Joachim E. Wildberger, Georg Mühlenbruch, Marco Das, Ralf Koos, Harald P. Kühl, Rolf W. Günther, Christian Hohl |
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| Rok vydání: | 2007 |
| Předmět: |
Male
Cardiac Catheterization medicine.medical_specialty medicine.medical_treatment Coronary Angiography Prosthesis Implantation Coronary artery disease medicine Image noise Humans Radiology Nuclear Medicine and imaging cardiovascular diseases Derivation Coronary Artery Bypass Cardiac imaging medicine.diagnostic_test business.industry Graft Occlusion Vascular Stent General Medicine Middle Aged equipment and supplies medicine.disease Blood Vessel Prosthesis Stenosis Catheter Treatment Outcome surgical procedures operative Angiography Female Stents Radiology Tomography X-Ray Computed business |
| Zdroj: | American Journal of Roentgenology. 188:361-369 |
| ISSN: | 1546-3141 0361-803X |
| DOI: | 10.2214/ajr.06.0120 |
| Popis: | The objective of our study was to determine the accuracy of 16-MDCT for evaluation of stent patency and in-stent stenosis in venous coronary bypass grafts.Fourteen patients who had previous stent placements in stenosed venous coronary bypass grafts underwent contrast-enhanced MDCT of the heart (collimation, 16 x 0.75 mm; 120 kV; 550 mAs(eff)) and invasive coronary angiography. A total of 20 stents were evaluated: Vessel and stent diameters proximal to, distal to, and at various sites inside the stent were measured on both techniques, and Bland-Altman plots and correlations were calculated. Image noise and image quality were also assessed applying a Student's t test for data comparison of image noise.All 20 bypass stents were correctly classified as patent. Vessel diameters outside the stent showed an excellent correlation (r = 0.90) and in-stent diameters showed a good correlation (r = 0.72), with lower values for MDCT due to blooming artifacts. All significant in-stent stenoses were correctly classified.In patients suspected of bypass in-stent stenosis, 16-MDCT may be considered as a valuable alternative to conventional angiography for evaluating bypass patency and in-stent stenosis. |
| Databáze: | OpenAIRE |
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